Geometry symbols

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Across
  1. 1. grads angle unit
  2. 5. line that start from point A
  3. 6. |x-y|
  4. 8. formed by two rays
  5. 9. AB
  6. 10. π
  7. 11. 1turn = 360°
  8. 12. ∟
  9. 15. Δ
Down
  1. 2. 1turn = 360degree
  2. 3. ~
  3. 4. ∥
  4. 7. 1° = 60′
  5. 13. a line from point A to point B
  6. 14. ″